Optics, DACs and cabling
A surprising share of network faults are a few centimetres of the physical layer: the wrong optic, a dirty connector, a cable run too far for its type.
DAC, multimode or single-mode
For a short hop within a rack, a direct-attach copper cable is cheap and simple. Over longer distances you move to fibre: multimode for shorter reaches, single-mode for long ones. Matching the optic to the fibre and the distance is the whole job — the wrong pairing may link up and then fail under load or temperature.
Both ends must agree
Optics have to match on wavelength and type at each end, and suit the fibre between them. A mismatch is a frequent cause of the intermittent flap — it works just well enough to come up, then errors. Keep connectors clean; a single speck on a fibre end-face raises the error rate.
Let us handle the physical side
Inside our facility the cabling, cross-connects and optics are ours to get right — see cross-connects. Tell us the link you need and the distance and we fit the correct optics; if a link is erroring, we will read the optical levels and swap the suspect part with remote hands.
Still stuck? Mail support@novogara.com — an engineer answers, at any hour. Back to the knowledge base